Modeling and Analysis of Low Frequency Noise in Ion-Field-Effect Transistors Sensors

Chermiti, Jihen; Azzouzi, Sawsen; Ali, Mounir Ben; Trabelsi, M.; Errachid, Abdelhamid

doi:10.4236/mnsms.2014.43013

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…Interestingly, the noise power density of the gas sensor was significantly increased after gas sensing, indicating that the sol-gel matrix, when exposed to SO 2 gas, can act as a noise source. Presumably, when the SO 2 gas binds to dye molecules, the number of positive ions in the sol-gel matrix is increased, and such positive ions can work as charge traps in the channel 36 .…”

Section: Resultsmentioning

confidence: 99%

Dye-functionalized Sol-gel Matrix on Carbon Nanotubes for Refreshable and Flexible Gas Sensors

Kim

Yoo

et al. 2018

Sci Rep

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We report a colorimetric dye-functionalized sol-gel matrix on carbon nanotubes for use as a refreshable and flexible gas sensor with humidity calibration. Here, we fabricated gas sensors by functionalizing dye molecules on the top of carbon nanotube networks via a sol-gel method. Using hybrid gas sensors with different dye molecules, we could selectively detect various hazardous gases, such as NH3, Cl2 and SO2 gases, via optical and electrical signals. The sensors exhibited rather large conductance changes of more than 50% following exposure to gas species with concentrations even under the permissible exposure limit. Significantly, we could refresh used gas sensors by simply exposing them to fresh N2 gas without any heat treatment. Additionally, our sensors can be bent to form versatile practical sensor devices, such as tube-shape sensors for ventilation tubes. This work shows a simple but powerful method for building refreshable and selective gas sensors for versatile industrial and academic applications.

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Section: Resultsmentioning

confidence: 99%

Dye-functionalized Sol-gel Matrix on Carbon Nanotubes for Refreshable and Flexible Gas Sensors

Kim

Yoo

et al. 2018

Sci Rep

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“…[1][2][3][4][5] For nanobiosensors to have a very good sensitivity of femtomolar level, noise processes in nanobiosensors must be understood, because noise sets a limit on the signal level that can be detected. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] We study a nanobiosensor whose central part is the electrolyte-insulator-semiconductor (EIS) system. 26,27) In the EIS system, there are various different noise sources, including thermal noise sources in the electrolyte, [11][12][13][14][15][16] adsorption= desorption noise sources from probe-target binding=unbinding, [17][18][19] thermal noise sources in the channel of field-effect transistors, 16) trapping=detrapping noise sources in the oxide, 9,10) and ubiquitous 1=f noise sources.…”

Section: Introductionmentioning

confidence: 99%

“…There have been many models and experiments for noise in biosensors. [6][7][8][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] In previous studies, many noise sources, such as binding=unbinding noise sources and 1=f noise sources, have been taken into account to compare experimental results. 6,[17][18][19] These approaches are based on the continuum model and include the diffusion and Poisson-Boltzmann equations to model ion movements in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Particle simulation of electrolytic ion motions for noise in electrolyte–insulator–semiconductor field-effect transistors

Chung

Lee

Seo

et al. 2016

Jpn. J. Appl. Phys.

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We conduct particle simulation for drain current noise in electrolyte–insulator–semiconductor field-effect transistors, to simulate how the thermal motion of charged particles near the interface affects the electrical current noise in the channel. We consider three cases: bulk electrolytes without and with charged spheres located at two different distances from the electrolyte–dielectric interface. Our results show that the drain current noise from noise sources in the electrolyte can be modeled by the sum of Lorentzian spectra, whose corner frequencies are determined by the RC product of the resistances of the bulk electrolyte and the region between the charged spheres and the interface, and the capacitance of the dielectric. Also, as the charged spheres approach the electrolyte–dielectric interface, the noise level increases, in agreement with the published experimental results.

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Noises and Signal-to-Noise Ratio of Nanosize EIS and ISFET Biosensors

Gasparyan¹,

Mazo²,

Simonyan³

et al. 2020

OJBIPHY

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The results of comparative theoretical analyzes of the behavior of internal low-frequency noises, signal-to-noise ratio and sensitivity to DNA molecules for EIS and ISFET based nanosize biosensors are presented. It is shown that EIS biosensor is more sensitive to the presence of DNA molecules in aqueous solution than ISFET sensor. Internal electrical noises level decreases with the increase of concentration of DNA molecules in aqueous solution. In the frequency range 10 −3-10 3 Hz noises level for EIS sensor about in three orders is higher than for ISFET sensor. In the other hand, signal-to-noise ratio for capacitive EIS biosensor is much higher than for ISFET sensor.

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Modeling and Analysis of Low Frequency Noise in Ion-Field-Effect Transistors Sensors

Cited by 4 publications

References 27 publications

Dye-functionalized Sol-gel Matrix on Carbon Nanotubes for Refreshable and Flexible Gas Sensors

Dye-functionalized Sol-gel Matrix on Carbon Nanotubes for Refreshable and Flexible Gas Sensors

Particle simulation of electrolytic ion motions for noise in electrolyte–insulator–semiconductor field-effect transistors

Noises and Signal-to-Noise Ratio of Nanosize EIS and ISFET Biosensors

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